The truck, which apparently was in the highway’s rightmost lane, flipped near exit 12 just before 8 a.m., trooper Christopher Kay said. The driver, a 40-year-old North Plainfield man was taken to Robert Wood Johnson University Hospital in New Brunswick with a minor arm injury, Kay said.

The truck was moved to the shoulder, and the highway was fully reopened about 8:45 a.m., he said. The cause of the accident is under investigation.